Spring harrow-tooth



I (No Model.)

B. F. EATON. SPRING HARROW TOOTH.

No.291, 038.1 Patient-ed Jan.1, 1884.

l/V VENTOI? ZIQQWW A orney UNITED STATES PATENT OFFICE.

BENJAMIN F. EATON, OF OOXSACKIE, NEIV YORK.

SPRING HARROW-TOOTH.

SPECIFICATION forming part of Letters Patent No. 291,038, dated January1, 1884.

(N 0 model.)

To all whom it may concern.-

Be it known that I, BENJAMIN F. EATON, of Goxsackie, in the county ofGreene and State of New York, have invented certain new and usefulImprovements in Sp ring Harrow-Teeth; and I do hereby declare thefollowing-to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

This invention relates to a spring harrowtooth, which is adapted to beclamped intermediately of its length to a barrow-beam and adjusted toany desired pitch, the object of the invention being to combine greatstrength with lightness of weight ina tooth of this class.

This invention consists of a curved spring harrow-tooth having one orboth of its edges bent rearwardly to form longitudinal flanges, as willbe hereinafter more fully set forth.

In the accompanying drawings, Figure 1 is a perspective view of abarrow-tooth constructed according to my invention, and having bothedges flanged. Fig. 2 is a similar view of a tooth having only one edgeflanged.

The tooth A, Fig. 1, is made'of forged steel and approximatelysemicircular in shape, its inner face being flat and one end having asingle point, (1, formed thereon, while the other end is provided withtwo points, I) I), though it may have three or more points, if desired.Both edges of the tooth are turned outward to form flanges 0 0,extending the whole length of the edges between the points, and sothoroughly bracing the tooth, as a whole, thatthe portion between theflanges may be made much thinner than would otherwise be possible in,the body of a tooth having sufficient strength for general use and aproper resilience for efficient action. By giving the tooth a singlepoint at one end and two short points at the other, I adapt it for useas a breakingup harrow-tooth and a cultivator-tooth. WVith a harrowhavingthe single points turned downward and the teeth clamped at aboutthe middle, newly-plowed ground may be reduced to condition forplanting; and by turning the double-pointed ends downward and preferablyextending the teeth two-thirds or three-fourths of the length below thebeams, broadcast-sown grain may be efficiently covered or the groundproperly loosened to permit the free sprouting of sown grain. The doublepoints, being short, leave very shallow ridges, so that no excess ofWater will accumulate and freeze, to the injury of the roots of youngplants.

In Fig. 2 the tooth Ahas a flange, 0, formed at only one edge, and thetooth is thereby very materially strengthened, while an economy of metalis effected as compared with a tooth. having two flanges.

I am aware that a barrow-tooth has been provided with a longitudinal ribon its rear face and between its edges, the tooth being made ofincreased thickness at its longitudinal central portion to form thestrengtheningrib. This construction of the tooth is expensive tomanufacture, as the steel must be forged or'rolled especially for thisform of tooth.

I am also aware that a harrow-tooth has been made triangular or curvedin cross-section; but such form fails to present the same efficientworking-surfaces of the blade as a flatfaced tooth.

I am also further aware that it is not broadly new to provide abarrow-tooth with strengthening beads or ribs on its edges, and I wouldnot therefore have it understood that I am in tending to broadly claimsuch as my invention; but v What I do claim is'- A curved flat-facedspring barrow-tooth having one or both edges bent rearward to formlongitudinal edge flanges on the rear side of the tooth, substantiallyas set forth.

In testimony whereof I have signed this speoification in the presence oftwo subscribing witnesses.

BENJAMIN F. EATON.

WVitnesses:

S. A. DWIGHT, G. H. RIoIrrMYER.

